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Glossary
Trident Planning and Installation Guide
intermittent fault
Fault or error that is only occasionally present due to unstable hardware or varying
software states.
LED
Light-emitting diode. One of the color-coded signal lights on each controller circuit
board that indicates the board’s status. Each system component includes at least the
Pass, Fail, and Active LEDs.
logical slot
Logical slot comprises a primary module, a hot-spare module, and associated field
termination components. A baseplate is a physical representation of a logical slot.
Markov model
Generalized modeling technique which can be used to represent a system with an
arbitrary number of modules, failure events, and repair events. A Markov model
can be mathematically solved to produce a resultant probability.
MP
Main Processor Module.
module
Active field-replaceable unit consisting of an electronic circuit assembly housed in
a metal cover.
MTBF
Mean-time-between-failure. The expected average time between failures of a
system, including the time taken to repair the system. Usually expressed in hours.
MTTF
Mean-time-to-failure. The expected average time to a system failure in a
population of identical systems. Usually expressed in hours.
MTTR
Mean-time-to-repair. The expected time to repair a failed system or subsystem.
Usually expressed in hours.
node
Any of the machines on a network.
node number
Physical address of a node.
non-triplicated
module
I
⁄
O module with a single set of field-interface circuitry for communication with all
three main processor modules. Non-triplicated modules provide a cost-effective
alternative to the use of TMR modules for non-critical environments.
open network
Network to which an external host can be connected.
output poll time
Time required by the controller to implement the outputs generated by the
application in response to inputs from the controlled process.
PE
Protective earth.
PES
Programmable electronic system.
Содержание Trident
Страница 1: ...Trident Version 1 2 Triconex An Invensys Company Planning and Installation Guide ...
Страница 10: ...x Contents Trident Planning and Installation Guide ...
Страница 16: ...xvi Training Trident Planning and Installation Guide ...
Страница 53: ...Main Processor Module 37 Chapter 3 System Description Model 2101 Main Processor Baseplate ...
Страница 63: ...Communication Module 47 Chapter 3 System Description Model 2201 Communication Module Baseplate ...
Страница 106: ...90 Input Output Modules Trident Planning and Installation Guide Model 2401 Digital Output Baseplate ...
Страница 128: ...112 Input Output Modules Trident Planning and Installation Guide Model 2451 Solid State Relay Output Baseplate ...
Страница 140: ...124 Covers Trident Planning and Installation Guide ...
Страница 145: ...Guidelines 129 Chapter 4 Installation and Maintenance Depth Dimensions for Baseplate and Module ...
Страница 216: ...200 Replacing Modules Trident Planning and Installation Guide ...
Страница 238: ...222 Diagread Cables and Debug Connectors Trident Planning and Installation Guide ...
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Страница 264: ...248 Glossary Trident Planning and Installation Guide ...
Страница 274: ...258 Index Trident Planning and Installation Guide ...